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helper.go
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/
helper.go
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/*
*
* Copyright 2023 puzzleweaver authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package remotewidgethelper
import (
"errors"
"strconv"
"github.com/dvaumoron/puzzleweb/common"
widgetservice "github.com/dvaumoron/puzzleweb/remotewidget/service"
"github.com/gin-gonic/gin"
)
const (
FilesKey = "Files"
urlName = "CurrentUrl"
pageNumberKey = "pageNumber"
pageSizeKey = "pageSize"
filterKey = "filter"
queryPageNumberKey = widgetservice.QueryKeySlash + pageNumberKey
queryPageSizeKey = widgetservice.QueryKeySlash + pageSizeKey
queryFilterKey = widgetservice.QueryKeySlash + filterKey
)
var (
errNotInt = errors.New("value can not be transformed to int")
errNotFloat = errors.New("value can not be transformed to float")
errNotMap = errors.New("value is not a map")
errNotSlice = errors.New("value is not a slice")
errNotString = errors.New("value is not a string")
errFilesType = errors.New("field Files is not of the expected type")
errEmptyUrl = errors.New("field CurrentUrl is empty")
errNoUser = errors.New("field Id is 0")
)
func AsMap(value any) (gin.H, error) {
if value == nil {
return nil, nil
}
m, ok := value.(map[string]any)
if !ok {
return nil, errNotMap
}
return m, nil
}
func AsSlice(value any) ([]any, error) {
if value == nil {
return nil, nil
}
s, ok := value.([]any)
if !ok {
return nil, errNotSlice
}
return s, nil
}
func AsString(value any) (string, error) {
if value == nil {
return "", nil
}
s, ok := value.(string)
if !ok {
return "", errNotString
}
return s, nil
}
func AsUint64(value any) (uint64, error) {
if value == nil {
return 0, nil
}
switch casted := value.(type) {
case uint:
return uint64(casted), nil
case uint8:
return uint64(casted), nil
case uint16:
return uint64(casted), nil
case uint32:
return uint64(casted), nil
case uint64:
return uint64(casted), nil
case int:
return uint64(casted), nil
case int8:
return uint64(casted), nil
case int16:
return uint64(casted), nil
case int32:
return uint64(casted), nil
case int64:
return uint64(casted), nil
case float32:
return uint64(casted), nil
case float64:
return uint64(casted), nil
case string:
i, err := strconv.ParseUint(casted, 10, 64)
if err != nil {
return 0, err
}
return i, nil
}
return 0, errNotInt
}
func AsFloat64(value any) (float64, error) {
if value == nil {
return 0, nil
}
switch casted := value.(type) {
case uint:
return float64(casted), nil
case uint8:
return float64(casted), nil
case uint16:
return float64(casted), nil
case uint32:
return float64(casted), nil
case uint64:
return float64(casted), nil
case int:
return float64(casted), nil
case int8:
return float64(casted), nil
case int16:
return float64(casted), nil
case int32:
return float64(casted), nil
case int64:
return float64(casted), nil
case float32:
return float64(casted), nil
case float64:
return casted, nil
case string:
f, err := strconv.ParseFloat(casted, 64)
if err != nil {
return 0, err
}
return f, nil
}
return 0, errNotFloat
}
func GetFormData(data gin.H) (gin.H, error) {
return AsMap(data[widgetservice.FormKey])
}
func GetFiles(data gin.H) (map[string][]byte, error) {
value := data[FilesKey]
if value == nil {
return nil, nil
}
m, ok := value.(map[string][]byte)
if !ok {
return nil, errFilesType
}
return m, nil
}
func GetBaseUrl(levelToErase uint8, data gin.H) (string, error) {
res, err := AsString(data[urlName])
if err != nil {
return "", err
}
i := len(res) - 1
if i == -1 {
return "", errEmptyUrl
}
for count := uint8(0); count < levelToErase; {
i--
if res[i] == '/' {
count++
}
}
return res[:i+1], nil
}
func GetCurrentUserId(data gin.H) (uint64, error) {
res, err := AsUint64(data[common.UserIdName])
if err != nil {
return 0, err
}
if res == 0 {
return 0, errNoUser
}
return res, nil
}
func GetPaginationNames() []string {
return []string{pageNumberKey, pageSizeKey, filterKey}
}
func GetPagination(defaultPageSize uint64, data gin.H) (uint64, uint64, uint64, string) {
pageNumber, _ := AsUint64(data[queryPageNumberKey])
if pageNumber == 0 {
pageNumber = 1
}
pageSize, _ := AsUint64(data[queryPageSizeKey])
if pageSize == 0 {
pageSize = defaultPageSize
}
filter, _ := AsString(data[queryFilterKey])
start := (pageNumber - 1) * pageSize
end := start + pageSize
return pageNumber, start, end, filter
}